In the summer 2017, when the winter
with winds and ice storm was far away, I decided to install a
Low Profile wind and ice rain resistant antenna. Why I decided
do this? There were some important reasons. My Beverage Antenna
was remade. Now the antenna wire was not going along wooden fence
but hang upped in the space.
About the antenna: http://www.antentop.org/021/Two_Wires_Beverage_Antenna_021.htm
Efficiency of the antenna is grown
up but reliability went down. Canadian winter with strong winds
and ice rain may very make my Beverage antenna down. So I need
weather proof antenna in case if the Beverage antenna cannot stand
the winter. Before I will give the description of the Low profile
weather proof antenna, I want to say that the Beverage Antenna
with honor has stand sever Canadian winter. However it was a small
incident with the antenna in rainy autumn. The antenna was dropped
down during CQ WW DX Contest.
Low Profile Antenna
for the 30, 20, 17, 15, 10 and 6- meter Bands Placed on a Fence
The reason of this incident was
home- made antenna insulator. The insulator was made from a thick
plastic tube. Figure 1 shows design of the insulator.
It is a very simple design. I used tens such insulators in my
However, inside the tube opening,
as I guess, some dust and water were penetrated, that then created
a conductive channel between antenna and a guy (made from a copper
wire in plastic insulation) that seems to have a resonant in the
15 meter band where I was operated in that time.
Insulator was melted and insulation
on the guy as well was melted. It was happened at the power of
my transceiver 90 W. Antenna was restored with help of commercial
made high quality insulators.
After visual inspection of my
Beverage antenna I found only two damaged insulators which were
touching the molten guy. This case shows how important it is to
break guy wires by insulators to prevent unwanted resonance in
the antenna guys. Now, at last, we go to description of the Low
Design of Home- Made
Molten Insulator and
Guy with Melted Insulation